// Copyright 2023 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package util

import (
	"github.com/pingcap/tidb/types"
)

// PlanCacheMatchOpts store some property used to fetch plan from plan cache
// The structure set here is to avoid import cycle
type PlanCacheMatchOpts struct {
	// paramTypes stores all parameters' FieldType, some different parameters may share same plan
	ParamTypes []*types.FieldType
	// limitOffsetAndCount stores all the offset and key parameters extract from limit statement
	// only used for cache and pick plan with parameters in limit
	LimitOffsetAndCount []uint64
	// HasSubQuery indicate whether this query has sub query
	HasSubQuery bool
	// StatsVersionHash is the hash value of the statistics version
	StatsVersionHash uint64

	// Below are some variables that can affect the plan
	ForeignKeyChecks bool
}
